25 results about "Phased array feed" patented technology

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

The application discloses a wide-angle domain real-time stable pointing and tracking scattering antenna system based on a phased array feed system, which comprises a multichannel digital phased array feed and a three-axis self-stable platform, the three-axis self-stable platform is used for determining the target direction of an antenna service beam in real time, and the multichannel digital phased array feed is used for real-time tracking and pointing determination of the antenna; the array scale of the multichannel digital phased array feed is n, there are M columns of units in an azimuth plane and N rows of units in an elevation plane, the array spacing is half of the wavelength of high frequency, in the n units, n-1 units are pure receiving channels, and the center unit is a transceiving shared unit; the multichannel digital phased array feed system guarantees real-time tracking and pointing determination of the antenna, and since the multichannel digital phased array feed can calculate the optimal path in millisecond, it is simple and easy for the scattering antenna to point to the optimal scattering angle in real time during the movement of a carrier.

The invention relates to an expandable rotating paraboloid double-reflector system SAR (Synthetic Aperture Radar) antenna, belongs to the technical field of spacecraft antennas, and solves the technical problems that the expandable rotating paraboloid double-reflector system SAR antenna is large in folding envelope and low in profile precision. The SAR antenna comprises a reflector and a phased array feed source device, the reflector comprises a main reflector body, an auxiliary reflector body and a conical force bearing barrel, the main reflector body is of a rotating paraboloid structure after being unfolded, the auxiliary reflector body is located on the inner side of the rotating paraboloid structure and connected with the main reflector body through the conical force bearing barrel, and the conical force bearing barrel is connected with the main reflector body. The phased array feed source device is arranged in the conical force bearing barrel, the phased array feed source device comprises a horn radiation unit, a T / R assembly and a heat conduction table, the cross section of the heat conduction table is of an axial symmetry structure shaped like a Chinese character'ji ', and the phased array feed source device is fixedly connected with an upper cabin plate of a load cabin of a satellite through the bottom face of a heat conduction table unit. The SAR antenna is high in precision, small in size, good in heat dissipation effect and high in stability.

The application provides a light and small full polarization SAR satellite system based on a reflecting surface mechanism, which comprises a comprehensive electronic cabin, a load cabin, a support cabin, an antenna unfolding mechanism, a multi-polarization phased array feed, and a reflecting surface antenna. The reflecting surface antenna is a double-focus ellipsoidal parabolic reflector, the azimuth focal point and the range focal point do not coincide, and the multi-polarization phased array feed is located at the azimuth focal point. The multi-polarization phased array feed comprises N dual-polarization radiation units arranged in a column in the longitudinal direction, penetrating through the top surface of the feed shell from the inside of the feed shell, and the dual-polarization radiation unit comprises a horn radiation port, a V-polarized radio frequency connection port, and an H-polarized radio frequency connection port; and N double-channel T / R components. The SAR satellite system of the application adopts a double-focus ellipsoidal parabolic surface combined with a multi-polarization phased array feed, has scanning and shaping capabilities along the range direction while realizing full polarization function.

This invention discloses a high-precision assembly device and precision measurement method for a parabolic cylindrical SAR antenna, belonging to the field of spacecraft structure technology. The device includes a worktable (10), a high-precision conformal fixture (5) for fixing the parabolic cylindrical reflector (2), a cabin fixture frame (4) for installing the satellite cabin (3), and first, second, third, and fourth moving adjustment mechanisms (6, 7, 8, 9) arranged in parallel. The fixed end of the moving adjustment mechanism is connected to the worktable, and the adjusting end is connected to the cabin fixture frame (4) through a ball joint bearing. Each moving adjustment mechanism has X-axis, Y-axis, and Z-axis moving adjustment functions. Through the synchronous or asynchronous adjustment of the four mechanisms, the satellite cabin (3) is driven to drive the phased array feed (1) to achieve six-degree-of-freedom precision fine-tuning. This invention realizes high-precision assembly and adjustment of the parabolic cylindrical antenna, with the characteristics of multiple degrees of freedom of adjustment, efficient data fusion, and high assembly accuracy.

The application provides a method and device for measuring and correcting antenna pointing deviation and sub-reflector servo error. The method comprises: obtaining focal plane field data by using a phased array feed placed on an antenna focal plane; determining an antenna aperture field corresponding to the current antenna pointing deviation and sub-reflector servo error according to the focal plane field data; obtaining pointing deviation and sub-reflector servo error information of the current antenna according to the antenna aperture field; and when any one of the pointing deviation value, the sub-reflector axial offset value, the sub-reflector lateral offset value and the sub-reflector tilt value is greater than or equal to the corresponding preset value, performing correction processing according to the pointing deviation and sub-reflector servo error information of the current antenna until the pointing deviation value, the sub-reflector axial offset value, the sub-reflector lateral offset value and the sub-reflector tilt value corresponding to the corrected pointing deviation and sub-reflector servo error information are all less than the corresponding preset value.

The application discloses a method for correcting deflection of an antenna radiation beam under a radome based on time reversal, and belongs to the technical field of radars. The method is used for processing signals received by each array element in an array antenna by using the time reversal method, and re-emitting the processed time reversal signals from the corresponding array element, so that more accurate beam pointing is achieved, and the aiming error is reduced. Based on the time reversal technology, the application can realize the effect of adaptive direction backtracking, and ensure that the target angle has the maximum gain under the target frequency; compared with a traditional phased array feeding method under the radome, the method has a better aiming error index.

The invention relates to a satellite with an expansion type SAR antenna, belongs to the technical field of spacecraft antennas, and solves the technical problem that the satellite with the expansion type SAR antenna is low in structural stability. The satellite comprises a satellite platform, an energy system and an expansion type SAR antenna, the satellite platform comprises a containing space defined by an upper cabin plate, a bottom plate and side plates, symmetrical supporting plates are further arranged in the containing space, and the supporting plates are connected with the upper cabin plate, the bottom plate and the side plates; the energy system comprises a solar array, and the solar array is arranged on the side plate; the expansion type SAR antenna comprises a phased array feed source device and a reflector, the upper space of the containing space is a load cabin, and the phased array feed source device and the reflector are fixedly installed on the upper cabin plate of the load cabin. The satellite with the expansion type SAR antenna has good structural stability.

The present disclosure provides options for use with global positioning system (GPS) satellite‑based navigation payloads. In example embodiments, a navigation payload may include an Earth Coverage (EC) antenna array, a Military Earth Coverage (MEC) antenna array, and a Regional Military Protection (RMP) antenna assembly comprising a phased‑array‑fed reflector antenna. The payload may be configured to generate navigation signals using a Mission Data Unit synchronized to an atomic clock, transmit Earth coverage navigation signals using the EC antenna array, transmit military navigation signals using the MEC antenna array, and electronically steer one or more high‑gain beams using the RMP antenna assembly without mechanical motion. In example embodiments, the payload may selectively apply different radiation patterns to different navigation signal types and may provide detectable navigation signals beyond a terrestrial field of view. Such configurations may support civil users, military users, and space‑based users with improved flexibility and resilience.

The invention discloses an interference type passive microwave imaging system based on a multi-beam feed reflector antenna, the system comprises an interference array and a processing unit, the interference array comprises P multi-beam feed reflector antenna forming arrays, each multi-beam feed reflecting surface antenna comprises a reflecting surface for reflecting and focusing microwave signals and a phase control feed source array for receiving the microwave signals reflected and focused by the reflecting surface; the phased feed source array comprises M unit antennas, and the M unit antennas are divided into N phased array feed source clusters; each phased array feed source cluster receives a microwave signal with a set direction; and the processing unit is used for performing correlation operation on microwave signals of the phased array feed source clusters with the same pointing direction of the P multi-beam feed reflector antennas to form interference type passive microwave imaging of the pointing direction. According to the invention, the number of interference units and the interference operation scale of the high-resolution passive microwave imaging system are reduced, the sensitivity of the high-resolution passive microwave imaging system is improved, and the imaging field of view is expanded.

HPEM effector antenna (1), having the following features: The HPEM effector antenna (1) comprises a metamaterial-based reflector array (2) arranged on the outside at a distance from an inner phased-array feed array (3), The metamaterial-based reflector array (2) has switchable reflector array elements (21) with the switching states transmitting or reflecting in order to achieve a high emission intensity for a given direction, The phased-array feed array (3) has switchable feed array elements (31) with the switching states transmitting or non-transmitting in order to selectively irradiate reflector array elements in order to achieve a high radiation intensity for a given direction.

The application discloses a variable-structure double-side visual agile satellite configuration and echo signal collection method, relates to the field of novel satellite system design, and solves the problem of limited satellite coverage range caused by the limitation of single instantaneous field of view. The satellite configuration comprises a satellite main structure, lifting arms, an imaging reconnaissance load, a three-axis joint and two-dimensional phased array feed antennas. The satellite main structure is internally provided with an equipment cabin for controlling the imaging reconnaissance load to detect. The satellite main structure is provided with lifting arms on the left and right sides, the imaging reconnaissance load is fixed on the lifting arms on the left and right sides of the satellite main structure, and the satellite main structure is connected with the lifting arms through the three-axis joint. The satellite main structure is also provided with two two-dimensional phased array feed antennas on the left and right sides, and the two-dimensional phased array feed antennas are rotationally connected with the top of the satellite main structure. The application is applied to the field of satellite detection.

The invention provides a phased array feed source system, which is characterized in that a dual-polarization feed source array in the system is formed by arranging N * M array element arrays, and a radiation patch in each array element comprises a slot structure which is in 90-degree rotational symmetry along the center of the radiation patch; the first feed port and the second feed port are located in the length direction of the first vertical slot, and the direction of the first feed port relative to the center of the radiation patch is orthogonal to the direction of the second feed port relative to the center of the radiation patch; the back of each array element is connected with a transceiver module, a first digital phase shifter and a first digital attenuator form a first output end and are connected with a first feed port, and a second digital phase shifter and a second digital attenuator form a second output end and are connected with a second feed port; the digital signal processing and control unit is configured to receive a task instruction, calculate an excitation signal and send a control instruction to the transceiver module array. The phased array feed source system has the advantages of high flexibility, high integration level, high precision and the like.

The application discloses a light and small super-high resolution wide-width spaceborne SAR system, which comprises a signal processor, a frequency synthesizer, a transmitting channel, a multi-channel receiving channel, a multi-channel internal scaler, a power supply and distribution unit, a beam forming network, a phased array feed and a parasol reflector; the light and small parasol reflector antenna combined with the phased array feed is used in a multi-channel multi-beam receiving mode to realize beam scanning receiving in the distance direction; and the whole surveying and mapping band is covered by switching different channels to receive. The system has the advantages of light weight, small size, low power consumption and low heat consumption, the imaging resolution can reach the centimeter level, the action distance is in the kilometer level, and the system has great significance for high-resolution earth observation.

The application discloses a kind of wideband delay lines based on comb-like substrate integrated waveguide, belong to microwave passive device and wideband delay line technical field.The delay line includes rectangular dielectric substrate (1), metal layer (2), input impedance matching structure (3), output impedance matching structure (4), multiple groups of periodic open stub (5) being attached to the both sides of upper surface metal layer, and periodic PBG slow wave unit (6) being loaded in upper metal layer.The application is set on the basis of comb-like substrate integrated waveguide structure periodic PBG slow wave unit, utilizes the slow wave characteristics of periodic PBG slow wave unit to realize delay function.Periodic PBG slow wave unit is located between two sides periodic open stub, and is equidistant, mirror image symmetry along the direction of propagation.The application can realize planar waveguide transmission and slow wave delay without relying on sidewall metallization via, and is suitable for true time delay beam forming network, phased array feed network and wideband radio frequency front end.

Methods, systems, and apparatus for making and using a lens antenna fed by a phased array. In some implementations, a communication device includes an antenna system includes a lens antenna and a feed antenna. The lens antenna can be a gradient index lens having a substantially oblate spheroid or substantially ellipsoidal shape, and having a plurality of layers that respectively have different dielectric constants. The feed antenna can include an array of antenna elements and can be spaced apart from the lens antenna. The communication device can include one or more processors configured to control excitation patterns for the antenna elements of the feed antenna to form beams directed at any of a range of spatial locations. The one or more processors can be configured to cause excitation patterns that concurrently excite multiple antenna elements of the feed antenna with different magnitudes and phase characteristics.